Waterproof and breathable vents Are made from breathable membrane and stainless steel shells and sealing o-rings, membrane materials are imported from united states, outer shells are machined by stainless steel material. Waterproof and breathable vents can provide effectively not only waterproof and dustproof performance, but also prevent oil or other harmful substances entering equipment. Meanwhile they can keep the pressure balance of inside and outside equipment. Used in below area: Led outdoor lighting industry Automotive manufacturing industry Solar photovoltaic industry Electronics and electrical equipment industry Communications equipment industry Security equipment industry, etc.